Apparatus for coating textile hose



Nov. 14, 1944. D. E. F. cANNEY ET AL 2,362,881

APPARATUS FOR CATING TEXTILE HOSE Filed Feb. 9, 1942 loA Patented Not. 14, 1944 n The present inventions-has f'or its object'l to reduce-y or leliminate fthe porosity of `lire V,hose and other textile hoses.,

Y Textile; hosev initially The inventionprovides an apparatus forfrendering atextile hosen,on,por`ous ,-g or nearly so', l which consistsofa spreaderjfortraversing along leaves the loomfin affiatf tened form,l and' when laid yout assumesamore ;or` less at shape,'the cross-,section varying in shape from point to point along-the length of thehoseg.

the` opener, and a distributor; following theopen; er, which servesftofdistribute the'latexr over,` theV Balkn, Benthamgliancasten England, assgnf rs vtov The SillickHoldingv Companyv Limited, Y, Newcastle-'unen-TraeEngland 1l f Appicatio'n Feinden? 9, 1942;!Seris1'N0. 430,149 ,a IIn Great Britain February 10, 1 941` f v-4jo1aim'sl' (owl-soy interior 'ofl the hose in theforln ofnfacontinuous lining of substantially uniform thickness; It KAis, necessary that the opener should be rigid lor nearly rigid, since ,itv must produce-a cross-sectional the hose, vtherebyboth expanding .the hose vto ya shape conforming with the cross-sectiongof krthe spreader and,'by extruding Va layer yof sealing agent` through thev peripheral gap between they` spreader'and the hosegapplying tothe interior-of the'hose, whilezsofexpandedQa lining of` sealing,r

' agent of substantially uniform thickness whichfis continuousv both;longitudinally and#v circumfer-v entially." L l ,-j

Thek spreader]v mayv be `formed inv twov parts;

namely a rigidl orl nearly rigid' front 'parte serving 1 yas an opener to expand the hose, and a rearv part serving' asfa distributor; vwhich conforms in shapeto the shape to Awhich the hose hasjbeen opened I by 'thefopeneigy *distributes the sealinggagent over7 the interiorofthe hosel and determines the thick.. ness of the lining. Thus the openermay be con-r stitutedbytahollow body containing a, supply of rubberlatexj andthe distributor by aplate, having a crossLsection ,-svmallerz than but'of the same shape in'vthevhose corresponding-'tothat of; the distributor which follows yaiteriit. Thespreader which vis drawnvertically through the hose, I ilk by@A thestring I I, consists of two parts and the opener isconstituted by a hollow rigid cylinder-I2, of

circular 'section but tapered at'its forward zend.. The cylinder IZcontains'asupplyJSkof rubberk latex, and serves,.a`s itpassesthrough the hose, to open it from the flattened form-in toa` rounded form.' Immediately to the rear of the cylinder t l2 is locatedthe distributor, which isfconstituted bya circular plate I4, of SlightIysmaller-Qdishape as` that ofi the'r front-part,`the latex pass.` y

ing out between the front and rear .parts as the.

spreaderfis vdrawnorlpushed` through the hose. y

with this arrangemenethe distributor, should follow 'sufficiently closely: behind the opener to enable@ it t'of operate onf -th'eho'se before rthey latter has tirneto los theshapejgiven to it'by th'e :passage o fjth'e opener.' 'The spreaderriet-:d l lar section, but may be of"any.o`the`r convenient enablea'uniform lining of sealing agenttofbe ap'- plied tothe hose; "The spreader maycGnVenientIy be slightly enlarged "at the portions'which .trave erse the selvedges of thehos'eto avoifdfany'tend-r ency ,offseali'ng agent*r ,ton accumulate there.`

AInthe accompanying drawinggFigures' ljand 2 are respectively longitudinal sections through two alternative forms of spreader according to the invention, showing the sameA iny position within the hose. c In Fig, 1y is shown an arrangement spreader is formed in two parts, namely an opener forrn to a cross. section conforming with that of ameter'than the cylinder. vThe plate I4 isysey. cured by a screw- I5 to supporting-members IB at-r tached .to the cylinderyand serves yto spread the'` latex, which escapes through the annular Vgap I'i` between :the .cylinder 'and plate, over the` interior of the hose,r .-The' latex, being 'extruded through the peripheral gap I8 betweenthe plate andthe; hose, (which has,` as explained above, been opened to rounded form by the passageof the cylinder) is distributed over the-internal surface of the hose. toA form the lining I9 of 'substantiallyy yuniform `In :the: arrangement Shown Fig. 12- -the spreader is againcomposite. The frontportion or opener' isiconstituted jby'a hollow cylinder 12, openatits rear end and containing rubber `latex v I3sandf-a pressure'device, constituted bya'plate 2| Vpressed'inra rearward direction y*by a spring 12,2; The vdistributor consists, asin the caseofZFiggl, of a circular'plate AIII secured to and'spacedy slightly tothe rear of the cylinder I2. y When lthis arrangementis drawn 'through the hose, the rubber latex'will be forced out through the ygap Il betweenthe rear end ofthe cylinder and' theplate, and'spre'adby thefplate over the innery surfaceof the hose to form the lining I9;

Afterthe spreader has been' traversedthrough the hose, the latex can'` be 'driedand Vulcanised by l 'any `convenient known method. 'Alternatively a pre-vulcanised' latex= can be used, rin'which ycase,-

subsequent vulcanisation is of course unnecessary.

n being traversed along the khose by ymaintaining in which the the hose stationary, and pulling or pushing thev ywhich serves to expand the hose from a flattened s spreader. being held stationary and lthe hosev .l

Although .we have so'far referred to the spreader spreader throughl it,v the reverse arrangement may, however, be adopted in suitable cases, the

cup and a rigid disc being placed behindone of.

the brushes, the rigid disc constituting a piston to receive the air pressure andthe compressed air.

serving not only to drive the brushes througlitlie hose but also to force the rubber into the poresof the fabric of the hose.

The present'l invention4 does not involve the use of any means additional,

to the spreader for causing the hose to assume a rounded form. On the contrary the spreader itself serves both to open the hose and to form, solely as a result of its passage through theV hose,`

a continuousV and substantiallyv uniform lining of' sealing a'gentonthe-interior ofthe hose. A brush could only'be effective to` spread a uniform layer of rubber over the internal surface of the hose if thehose were caused to assume amore or less exactly rounded'formbefore the brush is intro# aaeassr comprises a hollow, rearwardly open cylindrical plug for expanding the hose to rounded form, vsaid plug constituting a container for the sealing agent, a thin circular spreader plate mounted immediately in rear of the plug with its plane at right angles to the axis of said plug, and spacing means connecting the plugand plate and maintaining the plate in positive alignment with the plug to define between them a narrow circumferential gap for egress of sealing agent contained in. the plug, the radius of said plate being slightly smaller than the radius of said plug.

2. A1 device for applying a uniform internal coating-` of sealing agent to a normally flattened textile hose, whichY comprises a hollow, rearwardly open plug of rounded section for expanding the hoseto rounded form, said plug constituting a container for the sealing agent, a thin spreader plate=mounted immediately in rear of the plug duced; If' the brush were forced through a nre y hose with the latter in the attened condition, the effect could onlybe to open' it to a. roughly elliptical shape, but thenthe bristles facing in the direction of the minor-axis would be bent back while there would be a wide gap left between the hose andthe bristles facing. in the dif rectlon ofthe major axis. The layer ofi rubber distributed by thebrush` could not therefore beY of even approximately uniform thickness.v

Although we do: not exclude the use Ofcom'- pressed air-,in suitable cases; for driving the spreader alongthe hose, it will be understood that, the compressed air wouldfbeusedat the` compara-4 tively low pressure required to move the spreader and notl at the very much higher pressure whichv would be needed'if it were intended toy force intoy the pores of the fabric'of the hose thelining ide.- posited on it byfthe spreader.

While we have referred above tothe useof rubberv latex, it willbe understood thatwe may use.A

instead any other sealing agent, which canV be t l applied to the hose in a liquid or plastic condition and will subsequently dry to a flexible solidwhich will forma lining for4 the hose,` for example soin-` tions of naturat or synthetic vrubber .inorganic solvents or cellulosederivative compositions, such asI cellulose acetate compositions. The expres- Owingto the reduction in4 or elimination of l'the porosity of the hose by the lining, the invention `renders it possible touse, as fire hose, cottonlaosev pipes and hoses made of other materials, which, of themselves, wouldl be unsuitable for thefpurpose owing to their great porosity. c

What we claim asourinvention and desire to secure by Letters Patent is:

l. A device for applying a uniform` vcoating agent to a normally.' flattened textile hose, which with itsplane at right angles to the axis of said plug, spacing means-connecting the plug and plate for maintaining the plate in positive alignment with the plug to define between them a narrow circumferential gap for egress of sealing agent contained in the plug,r a plunger in the plug and a spring urging said plunger rearwardly tov express' sealing agent outwardly through said. gap, the plate being shaped to conform with the sec- A tion off the plug but being slightlyvr smaller ythan said section to permitof rearward flow .of sealing plug for expanding. the hose` to rounded form, said.

plug constituting a containerfor'the sealing agentl and having a tapered nose at itszforward end, a

l thin circular spreader plate mounted immediatelyin rear of the plug With-its plane atright. angles to the axis of said plug,.and4 spacing meansA connecting the plug andplate` andy maintaining` the plate in positive alignment with: the plug. to de fine between thema narrow' circumferential gap for egressof seaiingagent contained in the plug, the radius of *saidv plate being slightly smaller thany the radius of said plug;

4. A device for applying. a uniform internal coating of sealing agent to a normally attened textile hose, which comprises ahollow'rnember of rounded external contourfor expanding the hose to a corresponding rounded form, a thin spreader plate mounted immediately in rear of saidopener member with its plane at right .angles to the axis of said member, and spacing means connecting the openermember and the plate for maintaining the plate in positive alignment with the: opener member to define 4between them a narrow circumferential gap for egress of sealing agent flowing rearwardly through the opener member asl the latter traverses the hose, the` plate having a contour corresponding to but slightly smaller than that of the opener member to permit of rearward flow of sealing agent past said plate to form a uniform coating on the hose. 

